y is directly proportional to x.
When y = 15, x = 3 therefore y = 5x
When x = 12, then
y = 5 x 12 = 60.
a varies directly as b and a = 12 when b = 4. What is the constant of variation?
4x= y
y = 10x
y = 3x y = 3*19 = 57
80=4x, z=6x. find Z. x=80/4, x=20. z=6x20 z=120 answer= 120
a varies directly as b and a = 12 when b = 4. What is the constant of variation?
50
y varies directly as x y=kx, where k is a constant y=18 when x=3 18=3k k=6 y=6x
4x= y
y = 10x
Since r varies directly with s, we have r = ks (replace k with 5 and s with 7) r = (5)(7) r = 35
What is y? Fx varies with x, but y could be anything.
Find an equation of variation where y varies directly as x. One pair of values is y = 80 when x = 40
57
40
y = -5
m = 24